The questions of legal and экономико-информационной nature of technology of блокчейн and her private displays are first considered in-process, such as cryptocurrency and майнинг, in Russia and abroad. Functional descriptions of technology of блокчейн are investigational. Possibilities of her частного and государственно-правового application are shown, including in practice of activity of public authorities. The borders of her mark uses.The special attention is spared to cryptocurrency and майнингу. Among cryptocurrencies studied and биткоин as the most popular for today variety of cryptocurrencies. Paid attention to not only the modern state of the legal adjusting in the indicated sphere but also on the tendencies of legislative changes, that актуализирует work during the protracted period of time.Work has экономико-правовое maintenance, however written with an accessible language and intended not only for specialists (lawyers, financiers and traders of cryptocurrency) but also for the wide circle of readers, including potential investors and speculators at the market of appeal of cryptocurrencies and derivative instruments on them.